I would like to know a better answer but these are the reasons I know of:
- There was a lack of technology eg. tanks etc.
- The advantage was with the defender
- Their were so many people involved
Please answer if you know more reasons!!!
The reasons for it being so hard to take enemy trenches in World War One is because of the barbed wire which lay in front of their trenches. This had to be distroyed when shelling it or cut at night. The problem with cutting it at night though was it took along time but sometimes the clicking could be heard by the enemy and then the enemy would fire where the noise was coming from. Also at night you were unable to see where the barbed wire was so could hurt youself.
In this day and age, it is difficult to start a brand new country. Most new countries come from splinters of existing countries. This may be achieved by civil war or a secession referendum.
Seward survived the attempt on his life because of a wire instrument that he had to help relieve pain of previous injuries. The wire instrument prevented the knife of the assassin from striking too deep.
I dont know! lots of things like, society, religion, industry, majorcities/ ports, natural recorces, economy and nationalities.
I am not sure right off - my instinctive response would be to contact someone like the History Channel or Military Channel and find out if they have suggestions. Your local college/Universities would be easiest as well.